Chuck: The reason Blair attacked you is because she misses you. After 18 year, you can't read Waldorf subtext?

Serena: I shouldn't have to. If that's how she feels then she sould just tell me. It's the mature thing to do.

Chuck: This is coming from someone who just pushed their best friend into a cake. Look, you think your friendship is going to take care of itself. You're not kids anymore. You can't say you hate each other and then make up an hour later on the MET steps.

Serena: You tell her that.

Chuck: I'm telling you. And you should be careful. Because one day you're gonna find yourself telling people about Blair Waldorf. The girl whou used to be your best friend.

Gossip Girl